Phoenix, Arizona – Sweltering heat and stagnant winds are triggering a health alert across Maricopa County as dust and pollution levels spike, with the Phoenix metro under a PM-10 High Pollution Advisory through Wednesday.
According to the Arizona Department of Environmental Quality (ADEQ), elevated PM-10 — coarse particulate matter caused by dust and vehicle emissions — is building up due to minimal wind and ongoing high temperatures near 107°F. The advisory warns of increased health risks, especially for children, older adults, and people with heart or lung disease.
Phoenix and surrounding communities including Glendale, Mesa, and Tempe may see hazy skies and reduced visibility, especially during peak afternoon hours. ADEQ urges residents to limit outdoor activity, avoid yard work using gas-powered equipment, and stay indoors if sensitive to air quality. Dust can also be stirred up by travel on unpaved roads, and stabilization of loose soils is recommended.
While monsoon storms may bring brief relief late Wednesday night, conditions are expected to remain dry and hot through the Fourth of July. More advisories are possible if winds remain calm.
🚨 The PM-10 Advisory remains in effect through at least Wednesday night. Stay updated via ADEQ or local forecasts.
🔍 Five-Day Weather Outlook for Phoenix, AZ:
- Wednesday: High 107°F, 20% chance of PM showers; dusty and hot
- Thursday (July 3): High 104°F, slight AM storms; improving air briefly
- Friday (Independence Day): Sunny, high near 104°F; calm wind
- Saturday: Sunny, high 106°F; dry and stable air continues
- Sunday: High near 108°F, mostly clear; continued heat with slight haze
